Filter Life Monitor; Transmission Health Monitor - PREVOST H3-45 VIP Owner's Manual

C-4 Allison Transmission Other Features
N-R-N to select TES295
N-D-N to select TES389
The selector exits 30 seconds after entering
transmission fluid type mode or the ignition may be
turned off to exit earlier. Only one transmission fluid
type selection may be made after entering
transmission fluid type mode. All other attempts will
be ignored. Transmission fluid type mode needs to
be entered again if the wrong type of fluid is selected.
CAUTION
Verify prognostic fluid type setting matches
transmission fluid
notifications will be inaccurate when mismatched.
This could result in transmission damage from
running a TES389 fluid too long or cause shortened
TES295 fluid changes to occur.
CAUTION
Required calendar- based oil & filter change
intervals (based on months) still apply because Oil
Life Monitor function cannot measure time while
ignition power is OFF.
If the Oil Life Monitor function has not indicated the
need for a fluid change before 60 months have
passed when using TES295 fluid type or before 24
months have passed when using TES389 fluid
type, it will be necessary to change the fluid and
filters per calendar requirements and reset the
system.

FILTER LIFE MONITOR

This feature provides
transmission's fluid filters need to be replaced. It
helps extend filter change intervals to reduce routine
maintenance downtime while providing maximum
protection for the transmission.
The filter life indicator pressure switch signals the
transmission control module when fluid exiting the
main filter drops below a predetermined pressure.
Both the main and lube filters must be changed
when the TRANSMISSION SERVICE indicator
shows the main filter should be changed.
Filter Change Notification
The TRANSMISSION SERVICE indicator
flash for 2 minutes after the first selection of "D"
type. Oil Life Monitor
an alert when
PA-1638 Owner's Manual X3-45 VIP
(drive) range. Once the Filter Monitor mode has been
accessed via the shift selector, the "OIL FILTER
OK" or "REPLACE FILTERS" message is displayed
in the selector display window. An acceptable filter
life status is displayed as "OIL FILTER OK". An
unacceptable filter life status is displayed as
"REPLACE FILTERS".
Once the programmed threshold for maximum filter
pressure drop has been observed and verified, the
diagnostic
Maintenance Alert will be recorded to indicate that
the filter has reached the end of its designed life. At
the next
TRANSMISSION SERVICE indicator will flash for
2 minutes after the first selection of "D" (drive) range.
Thereafter, the indicator will illuminate and flash
upon each TCM initialization, continuing to flash for 2
minutes after the first selection of a drive range each
time, until service is performed and the indicator is
reset.
Failure to perform maintenance and reset the monitor
after a calibration-defined number of warnings will
result in the illumination of the CHECK light with
associated message in the DID and diagnostic code
P088B will be recorded to indicate a highly
deteriorated filter.
Read And Reset Filter Life Monitor From
Selector
To enter the filter life monitor, press simultaneously
the (Upshift) and
times. An acceptable filter life status is displayed as
"OIL FILTER OK". An unacceptable filter life status
is displayed as "REPLACE FILTERS".
The feature will reset automatically when the main
fluid filter has been changed and the pressure drop
across the filter no longer exceeds the threshold
the
value. A manual reset can be performed by
depressing and holding the MODE button for ten (10)
seconds while the Filter Life Monitor function is
displayed. It may also be reset by selecting N-R-N-
R-N-D-N on the shift selector, pausing briefly (less
than 3 seconds) between each selector movement,
with the ignition ON and the engine not running. The
TRANSMISSION SERVICE indicator
briefly following a reset to acknowledge the reset
was successful.

TRANSMISSION HEALTH MONITOR

This prognostic feature determines clutch life status
will
of the transmission's clutches and alerts you when
code P088A Transmission
initialization of the
(Downshift) arrows three
Filter
TCM, the
illuminates